Manufacture of IMR powders dates back more than 200 many years when the company was originally Launched by E.I DuPont. Available for use in many reloading apps, the IMR number of powder is dependable by reloaders all around the world.IMR 4227 Powder in inventory now may be the Magnum Pistol Powder during the IMR lineup. If it says Magnum, 4227 powd… Read More